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拟定了测定超痕量锰的新催化光度法。方法基于存在氨三乙酸为活化剂,以高碘酸钾催化氧化甲基红。方法的检出限为4×10~(-11)g/ml,表观摩尔吸光系数为2×10~7L·mol~(-1)·cm~(-1),测定锰量的线性范围为2—28ng/25ml,可直接分析水样和谷物制品中锰。
A new catalytic spectrophotometric method was developed for the determination of trace amounts of manganese. Methods Based on the presence of nitrilotriacetic acid as an activator, potassium periodate was used to catalyze the oxidation of methyl red. The detection limit was 4 × 10 ~ (-11) g / ml and the apparent molar absorptivity was 2 × 10 ~ 7L · mol -1 (cm -1). The linear range For 2-28ng / 25ml, direct analysis of manganese in water samples and cereals.